Welcome to our dedicated page for BillionToOne SEC filings (Ticker: BLLN), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
BillionToOne, Inc. filings document the regulatory record for a public molecular diagnostics company commercializing QCT-based prenatal and oncology testing. Recent Form 8-K disclosures furnish operating results, financial guidance, Regulation FD presentation materials and executive compensation arrangements, including the company’s annual incentive plan and equity-based payment provisions.
Proxy materials describe annual meeting mechanics, stockholder voting matters, board governance and related governance disclosures. Together, the filings address the company’s clinical testing revenue categories, Class A common stock compensation framework, furnished earnings materials and governance matters relevant to its Nasdaq-listed operating-company status.
BLLN insider sale notice filed under Rule 144. The filing lists a proposed or reported sale of 2,832 Class A shares by John R. Ten Bosch with a transaction date of 06/15/2026 and proceeds shown as $287,363.04. The shares are labeled Pre IPO Shares with an original date of 12/31/2021.
BillionToOne, Inc. Chief Product Officer Sakakibara Shan Riku reported a mix of stock sales and an option exercise in Class A Common Stock. The insider sold a total of 8,000 shares in open-market transactions at $110.00 per share.
On the same date, the insider also exercised stock options to acquire 4,000 shares of Class A Common Stock at an exercise price of $8.65 per share. The filing notes these transactions were carried out under a pre-arranged Rule 10b5-1 trading plan, indicating they were scheduled in advance rather than timed discretionarily.
BLLN reported an insider sale. Shan Sakakibara sold 8,000 Class A shares on 06/08/2026 for $785,800, according to the filing. The filing also lists prior and recent option-related entries showing Class A shares tied to a stock option exercise and pre-IPO holdings.
BillionToOne, Inc. officer ten Bosch John Roderick reported selling a total of 2,832 shares of Class A Common Stock in open-market transactions. The sales were executed at a price of $101.47 per share on June 15, 2026. Following these transactions, the filing shows direct holdings of 34,968 shares after one sale and 36,384 shares after another. According to a footnote, the trades were made under a pre-arranged Rule 10b5-1 trading plan adopted on March 6, 2026, indicating they were scheduled in advance rather than timed discretionarily.
BillionToOne, Inc. director and Chief Technology Officer David Tsao reported a mix of stock sales and option exercises in Class A Common Stock. He completed open-market sales totaling 20,000 shares on June 15, 2026 at weighted average prices generally around $100–$104 per share, in multiple tranches.
On the same date, he exercised stock options to acquire 20,000 shares at an exercise price of $2.80 per share. After these transactions, Tsao directly holds 19,296 shares of Class A Common Stock and 630,000 stock options with a $2.80 exercise price expiring on June 7, 2031. The filing states the transactions were carried out under a pre-arranged Rule 10b5-1 trading plan adopted on March 6, 2026.
BillionToOne, Inc. reported the results of its Annual Meeting of Stockholders held on June 10, 2026. Stockholders voted as a single class, with Class A shares carrying one vote each and Class B shares carrying 15 votes each, based on 41,442,114 Class A and 4,552,650 Class B shares outstanding as of April 17, 2026.
Two Class I directors were elected to terms ending at the 2029 annual meeting. Oguzhan Atay received 76,387,783 votes for and 348,276 withheld, while Akshay Rai received 76,297,791 votes for and 438,268 withheld; each proposal recorded 562,085 broker non-votes.
Stockholders also ratified the appointment of PricewaterhouseCoopers LLP as independent registered public accounting firm for the year ending December 31, 2026, with 77,277,103 votes for, 197 against, and 20,844 abstentions. No broker non-votes were recorded on this routine proposal.
BillionToOne, Inc. director Thomas S. Bremner reported an equity award on a Form 4. He acquired 3,017 shares of Class A common stock on a grant/award basis at a price of $0.00 per share, bringing his directly held position to 11,350 shares after the transaction.
According to the footnote, the award consists of restricted stock units (RSUs), each representing a contingent right to receive one share of Class A common stock. These RSUs are subject to a service-based vesting requirement, which will be satisfied on the earlier of the date of the next annual meeting of stockholders or the one-year anniversary of June 10, 2026.